Mercurial > dive4elements > river
annotate gwt-client/src/main/java/org/dive4elements/river/client/shared/DoubleUtils.java @ 5861:172338b1407f
GWT client: Added copyright header.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Sun, 28 Apr 2013 14:30:15 +0200 |
parents | 5aa05a7a34b7 |
children | ea9eef426962 |
rev | line source |
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5861
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.client.shared; |
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10 |
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11 |
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12 public final class DoubleUtils { |
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13 |
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14 public static final String DEFAULT_DELIM = " "; |
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15 |
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16 |
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17 private DoubleUtils() { |
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18 } |
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19 |
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20 |
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21 public static Double getDouble(String value) { |
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22 try { |
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23 return Double.valueOf(value); |
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24 } |
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25 catch (NumberFormatException nfe) { |
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26 // do nothing |
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27 } |
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28 |
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29 return null; |
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30 } |
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31 |
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32 |
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33 public static double[] getMinMax(String value) { |
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34 return getMinMax(value, DEFAULT_DELIM); |
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35 } |
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36 |
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37 |
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38 public static double[] getMinMax(String value, String delim) { |
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39 if (value == null) { |
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40 return null; |
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41 } |
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42 |
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43 String[] values = value.split(delim); |
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44 |
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45 int len = values != null ? values.length : 0; |
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46 double[] mm = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE }; |
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47 |
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48 for (int i = 0; i < len; i++) { |
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49 Double d = getDouble(values[i]); |
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50 |
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51 if (d != null) { |
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52 mm[0] = mm[0] < d ? mm[0] : d; |
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53 mm[1] = mm[1] > d ? mm[1] : d; |
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54 } |
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55 } |
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56 |
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57 return mm[0] != Double.MAX_VALUE && mm[1] != -Double.MAX_VALUE |
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58 ? mm |
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59 : null; |
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60 } |
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61 |
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62 /** toIndex is not inclusive, fromIndex is. */ |
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63 static void fill(double[] array, int fromIndex, int toIndex, double val) { |
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64 for (int i = fromIndex; i < toIndex; i++) { |
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65 array[i] = val; |
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66 } |
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67 } |
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68 |
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69 /** @see java.util.Arrays.copyOf */ |
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70 public static double[] copyOf(double[] toCopy, int newLen) { |
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71 double[] nArray = new double[newLen]; |
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72 |
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73 if (toCopy == null) { |
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74 fill(nArray, 0, nArray.length, 0d); |
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75 return nArray; |
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76 } |
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77 |
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78 int goTo = (newLen < toCopy.length) |
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79 ? newLen |
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80 : toCopy.length; |
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81 |
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82 for (int i = 0; i < goTo; i++) { |
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83 nArray[i] = toCopy[i]; |
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84 } |
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85 fill (nArray, goTo, nArray.length, 0d); |
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86 return nArray; |
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87 } |
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88 } |
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89 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |